Long-distance relationship has always been that I call him on my own initiative every night, and he seldom contacts me, even doesn't send text messages. I don't know what this is.

From what you described, it is possible that you are not the girl that the man fell in love with at first sight, and he doesn't have much feelings for you. Therefore, although you have established a love relationship, he lacks love consciousness and love performance, and he is like an ordinary friend to you.

In this case, it depends on your own opinion. If you really like him, you don't have to call him too many times. You can call him every three to five days, but the call time is longer. Of course, the specific time depends on the content and atmosphere of the call. If you find him absent-minded and just deal with it, you can stop. Don't be ignorant. Try to help him when he is in trouble. Get along like this for a while. If he is otherwise good or still like this, he should consider separating. If you don't have much feelings for him, you can just consider breaking up.

Love cannot be compelled. Love is only a prelude to marriage, but a stage of mutual appreciation. If you get married, you will face more practical problems in the future. You should consider whether your situation can face and solve these problems.